Pre-Cambrian Tenn Rt 23 Blue Ridge


I 26 Blue Ridge E of Ashville I 26 Tn-NC border road cut exposing a mix of metamorphosed sedimentary rocks intruded by granite.  The ages and names of the units involved may determined from local roadside maps of the geology I 26 Tn-NC border road cut exposing a mix of metamorphosed sedimentary rocks intruded by granite.  The ages and names of the units involved may determined from local roadside maps of the geology I 26 Tn NC border Metamorphics - Rip rap fill - loose block of Foliated Mylonite, with the dark minerals are amphiboles, biotite mica and the white minerals a mix of feldspars and quartz I 26 Tn NC border Metamorphics - Rip rap fill - loose block of Foliated Pegmatite, characterized by dark minerals that include amphiboles, biotite mica and white minerals which are a mix of feldspars and quartz I 26 Tn NC border Metamorphics - Rip rap fill - loose block of Foliated Gneiss characterized by dark minerals that include amphiboles, biotite mica and white minerals which are a mix of feldspars and quartz I 26 Tn NC border Metamorphics - Rip rap fill - centered on a loose block of Foliated Mylonite characterized by dark minerals that include amphiboles, biotite mica and white minerals which are a mix of feldspars and quartz I 26 Tn NC border Metamorphics - Rip rap fill - centered on a lloose block of Foliated Gneiss characterized by dark minerals that include amphiboles, biotite mica and white minerals which are a mix of feldspars and quartz I 26 Tn NC border Metamorphics - Rip rap fill - loose block of Foliated Gneiss characterized by dark minerals that include amphiboles, biotite mica and white minerals which are a mix of feldspars and quartz I 26 Tn NC border Metamorphics - Rip rap fill - loose block of Foliated Gneiss characterized by dark minerals that include amphiboles, biotite mica and white minerals which are a mix of feldspars and quartz I 26 Tn NC border Metamorphics - Rip rap fill - loose block of Foliated Granite characterized by dark minerals that include amphiboles, biotite mica and white minerals which are a mix of feldspars and quartz I 26 Tn NC border Metamorphics - Rip rap fill - loose block of Foliated Mylonite characterized by dark minerals that include amphiboles, biotite mica and white minerals which are a mix of feldspars and quartz I 26 Tn NC border Metamorphics - Rip rap fill - loose block of Foliated Granite characterized by dark minerals that include amphiboles, biotite mica and white minerals which are a mix of feldspars and quartz I 26 Tn NC border Metamorphics - Rip rap fill - loose block of Foliated Gneiss characterized by dark minerals that include amphiboles, biotite mica and white minerals which are a mix of feldspars and quartz.   I 26 Tn NC border Metamorphics - Rip rap fill - loose block of Foliated Gneiss characterized by dark minerals that include amphiboles, biotite mica and white minerals which are a mix of feldspars and quartz I 26 Tn NC border Metamorphics - Rip rap fill - loose block of Foliated Gneiss characterized by dark minerals that include amphiboles, biotite mica and white minerals which are a mix of feldspars and quartz I 26 Tn NC border metamorphics or puzzled geologists in a mid career crisis I 26 Tn NC border Metamorphics - Rip rap fill - loose block of Foliated Mylonite characterized by dark minerals that include amphiboles, biotite mica and white minerals which are a mix of feldspars and quartz I 26 Tn NC border Metamorphics - Rip rap fill - loose block of Foliated Gneiss characterized by dark minerals that include amphiboles, biotite mica and white minerals which are a mix of feldspars and quartz I 26 Tn-NC border road cut exposing a mix of metamorphosed sedimentary rocks intruded by granite.  The ages and names of the units involved may determined from local roadside maps of the geology I 26 Tn-NC border road cut exposing a mix of metamorphosed sedimentary rocks intruded by granite.  The ages and names of the units involved may determined from local roadside maps of the geology I 26 Tn-NC border road cut exposing a mix of metamorphosed sedimentary rocks intruded by granite.  The ages and names of the units involved may determined from local roadside maps of the geology

Appalachian Blue Ridge - Metamorphic Road Cuts

This is part of the extraordinary outcrops of metamorphic rocks exposed along I 26 from Ashville towards Johnson City just north of the North Carolina-Tennessee border. Some of the photographs are of the loose blocks of metamamorphic rock used as rip-rap fill, probably from local quarries and nearby road cuts.

The geology exposed along roadside from Ashville NC to Johnson City TN is spectacular but without geologic maps can be confusing. Great road side maps that are likely to help are published by the AAPG and also the Amateur Geologist home site is a really good source for maps too, at equally reasonable prices!

Image photographs are taken by Christopher Kendall using a digital Nicon Coolpix camera.
Friday, May 20, 2016
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